$\lim_{x\to\infty}\sqrt{2x^2+3x}-\sqrt{2x^2-5}$

$\int\left(\frac{9x}{9+x^2}\right)dx$

$3x^2-12x+7=0$

$\int\frac{\left(6x+4\right)\left(3x^2+4x\right)}{\left(3x^2+4x\right)}dx$

$x^2+\frac{24}{13}+\frac{144}{169}$

$\lim_{x\to1.3}\left(x\right)^2\left(3x-2x\right)$

$cos^2\left(2x\right)+4sin^2\left(x\right)=1$